11272505 has 4 divisors (see below), whose sum is σ = 13527012. Its totient is φ = 9018000.

The previous prime is 11272501. The next prime is 11272519. The reversal of 11272505 is 50527211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3024121 + 8248384 = 1739^2 + 2872^2 .

It is not a de Polignac number, because 11272505 - 2² = 11272501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11272501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127246 + ... + 1127255.

It is an arithmetic number, because the mean of its divisors is an integer number (3381753).

Almost surely, 2^11272505 is an apocalyptic number.

It is an amenable number.

11272505 is a deficient number, since it is larger than the sum of its proper divisors (2254507).

11272505 is an equidigital number, since it uses as much as digits as its factorization.

11272505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254506.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 11272505 is about 3357.4551374516. The cubic root of 11272505 is about 224.2195511612.

Adding to 11272505 its reverse (50527211), we get a palindrome (61799716).

The spelling of 11272505 in words is "eleven million, two hundred seventy-two thousand, five hundred five".